Mannatech, Inc. Coppell, TX, has made two appointments to its senior management team. John Price has joined the company as its new president of International Operations and Robert Sinnott, MNS, PhD has joined the company as chief science officer and vice president of R&D. Mr. Price comes to Mannatech having previously worked at Herbalife, Incorporated and Dr. Sinnott, founder of Larrea BioSciences Corporation (LRRA) and holder of five U.S. patents, will lead the development of the company’s new healthcare products.